On some pages I have the possibility to write a comment (name, email, website, comment). The labels are now in my default language. Now I want to use the English labels for the whole comment section. How can I reach this?

I searched a little bit and found out that I can set some labels with

<?php comment_form(array('label_submit' => 'Submit comment' )); ?>

But then I would have to set each label and I don't know if I can find and catch all these labels. Are there other ways doing this?